Ridge construction for a greenhouse



FIG. 1 is a top view of a ridge construction for a greenhouse embodying my design;

FIG. 2 is a front view of said ridge construction for a greenhouse;

FIG. 3 is a righthand view of the ridge construction, the lefthand being a mirror image of the righthand view;

FIG. 4 is a rear view of said ridge construction for a greenhouse; and

FIG. 5 is a bottom view of said ridge construction for a greenhouse. 

The ornamental design for a ridge construction for a greenhouse, substantially as shown and described. 